CVE-2026-20863
Unknown Unknown - Not Provided
Double Free in Windows Win32K Enables Local Privilege Escalation

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description
Double free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
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Meta Information
Published
2026-01-13
Last Modified
2026-01-13
Generated
2026-06-16
AI Q&A
2026-01-14
EPSS Evaluated
2026-06-14
NVD
CVE-2026-20863
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_win32k *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-415 The product calls free() twice on the same memory address.
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Executive Summary

This vulnerability is a double free issue in the Windows Win32K component called ICOMP. It allows an authorized attacker to locally elevate their privileges on the affected system. [1]

Impact Analysis

An attacker who already has some level of access to the system can exploit this vulnerability to gain higher privileges, potentially allowing them to perform unauthorized actions or access sensitive information. [1]

Mitigation Strategies

Apply the security updates provided by Microsoft for CVE-2026-20863 as soon as possible to mitigate the elevation of privilege vulnerability caused by the double free in Windows Win32K - ICOMP. [1]

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